DALLAS (AP) — An anesthesiologist who attached a heart monitor to President John F. Kennedy in a Dallas hospital’s emergency room and interviewed wounded Texas Gov. John Connally for surgery has died. Dr. Adolph H. “Buddy” Giesecke Jr. was 79.

The doctor’s son, Martin Giesecke, says his father died Dec. 24 at his home in the Dallas suburb of Irving.

The elder Giesecke was working at Parkland Hospital on Nov. 22, 1963, when Kennedy was assassinated and Connally was struck while riding in the same vehicle. The son says Dr. Giesecke recalled that the president didn’t flinch while he inserted heart probes into Kennedy’s skin.

Giesecke spent most of his career at Parkland’s neighboring University of Texas Southwestern Medical Center. He was chairman of the anesthesiology department from 1981 to 1992.